We provide comprehensive advice on competition and consumer law. We represent clients before Polish and international institutions, including the Office of Competition and Consumer Protection and the European Commission.

In view of the hard-line turn recently observable in policy and operations of the competition authorities, and bearing in mind the sheer gravity of penalties which may be incurred for non-compliance of business activities with the requirements of competition law, we offer cooperation with the best experts in the market.

  • Concentrations of business enterprises
  • Market collusion (e.g. unlawful distribution arrangements, collusive bidding)
  • Abuse of dominant market position
  • Consumer law (e.g. audits of documentation and procedures, representation in proceedings)
  • Contracting advantage
  • Payment backlogs
  • Compliance
  • Training and workshops

Specialization services

Lawsuits
Contract advantage/payment congestion
Dominant position
If the regulator comes knocking
Development of enterprise documentation
Conducting the concentration process

The basic principle that unites our team is to build relationships based on respect and trust.

We have been advising entrepreneurs for 30 years, so we understand the nature of business and how to properly support it. We focus on efficiency, transparency and partnership.

Competition and consumer law

Bernadeta Kasztelan-Świetlik

Partner
Attorney-at-law

Bernadeta Kasztelan-Świetlik
Competition and consumer law

Karolina Krzal-Kwiatkowska

Managing Associate
Attorney-at-law

Karolina Krzal-Kwiatkowska
Competition and consumer law

Natalia Leśna

Senior Associate
Attorney-at-law

Natalia Leśna
Competition and consumer law

Karolina Olszewska

Senior Associate

Karolina Olszewska
Competition and consumer law

Experience

Selected projects

  • Advised cyber_Folks on obtaining antitrust clearance in Poland for the acquisition of the French company PrestaShop through SPV cyber_Pixel and the contribution of Polish technology companies Sylius and BitBag thereto
  • Legal support for ANWIM S.A. in several transactions for the acquisition of control over fuel stations (Elbah II, Snowfinch group, Circle K). In the case of the stations belonging to Elbah II, the President of UOKiK issued a conditional approval, which required negotiations with the Office to formulate the appropriate condition.
  • Legal support for the Gas Transmission Operator GAZ-SYSTEM S.A. regarding the acquisition of control over Gas Storage Sp. z o.o. from PKN Orlen S.A.
  • Comprehensive legal support for VirtusLab in the transaction of acquiring control over SoftwareMill
  • Legal support for Elemental Strategic Metals sp. z o.o. regarding the establishment of a joint venture with Ascend Elements Inc.
  • Legal support for Synthos Green Energy in proceedings relating to the establishment of a joint venture operating in the broadly defined energy market
  • Legal support for Polimex Mostostal S.A. in the establishment of a joint venture (JV) with Tedom a.s
  • Representation before the OCCP of BNP Paribas Bank – full annulment of the penalty imposed by the OCCP on the Bank (over PLN 2.8 million) for violation of collective consumer interests
  • Legal support for Everest Finanse S.A. in proceedings before the UOKiK (Bocian Pożyczki)
  • Representation of Telestrada S.A. in a case of violation of collective consumer interests
  • Audit of regulations and contract templates at mBank Brokerage Office
  • Preparation of a notification and representation before the Office of Competition and Consumer Protection in proceedings relating to the establishment by Engie and EDF of a joint venture to operate in the wind farm construction market
  • Preparation of an application and representation before the OCCP in proceedings relating to the establishment of a joint venture (SGE and PKN Orlen) for the generation of clean zero-carbon energy by nuclear power micro plants
  • Ongoing advice to WYBOROWA S.A. on compliance of activities with competition law
  • Representing Decora S.A. before the European Commission in anit-dumping proceedings
  • Legal services for the LUX MED Group in the area of consumer protection
  • Representing Döhler Sp. z o.o. in the negotiation process with the President of the Office of Competition and Consumer Protection
  • Providing competition law consulting services to the Polish Cosmetics Industry Association
  • Obtaining approval from the Office of Competition and Consumer Protection for OTCF S.A.‘s acquisition of control over Simple Creative Products
  • Legal advice on the implications of the entry into force of the Law on Contractual Advantage for leading companies in the dairy industry
  • Representation of PKP Cargo S.A. in proceedings before the Office of Competition and Consumer Protection and the Courts concerning practices limiting competition – reduction of penalty by 83%
  • Legal counsel to Elemental Holding S.A. (development of a definition of the relevant market)
  • Legal advice to PKP Cargo (development of a definition of the relevant market)
  • Legal advice and representation before the OCCP of Enterprise Investors (analysis of the need to report planned concentrations to competition authorities in Poland and the European Union)
  • Representing Vivus Finance sp. z o.o. before the UOKiK in proceedings concerning advertising and contractual patterns
  • Conducting trainings for the Polish Milk Chamber on competition law and the Law on Contractual Advantage
  • Preparation of a notification and representation of a client before the OCCP in proceedings relating to the establishment by Synthos of a joint venture with VattenFall to operate in the wind farm construction market
  • Representation of Bank Pocztowy S.A. in proceedings before the OCCP concerning violation of collective consumer interests (modification clauses)
  • Representing ING Bank Śląski S.A. before the OCCP in proceedings concerning modification clauses
  • Audit of contractual templates for inCredit
  • Conducting a legal audit for Aasa Polska S.A.
  • Conducting a legal audit for Twino Group
  • Conducting a legal audit for Idea Bank
  • Providing competition law advisory services for Polski Bank Komórek Macierzystych
  • Conducting proceedings before the German anti-monopoly authority (Bundeskartellamt) on the acquisition of control over Budimex Danwood Sp. z o.o.
  • Legal support for Impel S.A. before the European Commission and national authorities in the application of Community law

News
& Insights

17.12.2025

GESSEL advises cyber_Folks on the acquisition of PrestaShop

GESSEL advised cyber_Folks S.A., a leading e-commerce technology provider in Central and Eastern Europe listed on the Warsaw Stock Exchange, on its ac...

News
NEW!
GESSEL advises cyber_Folks on the acquisition of PrestaShop

17.09.2025

FDI and Merger Control in CEE : Your A-Z Guide

Investing in Central and Eastern Europe and executing transactions there presents a major business opportunity, but also a growing regulatory challenge. The dynamic shif...

News
FDI and Merger Control in CEE : Your A-Z Guide

24.07.2025

Screening of certain inbound foreign investments – The Polish Ministry of Development and Technology receives new powers

The Polish president has just signed into law amendments to the legislative Act regarding control of certain foreign investments. One of the effects is that the Ministry...

News
Screening of certain inbound foreign investments – The Polish Ministry of Development and Technology receives new powers

25.06.2025

GESSEL among the leaders of the 23rd edition of the Rzeczpospolita Ranking of Law Firms

GESSEL was recognised in six categories in the 23rd edition of the Rzeczpospolita Ranking of Law Firms, including – for the first time – in the Real Estate and Banking a...

News
GESSEL among the leaders of the 23rd edition of the Rzeczpospolita Ranking of Law Firms

22.04.2025

GESSEL advised on the sale of the operator of the Pizzeria Stopiątka chain to Domino’s Pizza Poland

GESSEL provided comprehensive legal advice to the founder and sole owner of Mastergrupa sp. z o.o., the operator of the nationwide franchise network Pizzeria Stopiątka, ...

Case studies
GESSEL advised on the sale of the operator of the Pizzeria Stopiątka chain to Domino’s Pizza Poland

27.03.2025

Legal 500 Ranking!

The 2025 edition of Legal 500 is out, and we’ve been recognised in 6 categories this year. In addition, 23 of our lawyers received individual awards or were recommended ...

News
Legal 500 Ranking!
All posts

See how else we can help you.

Check out other specializations

List of specializations
Tygrys Kancelarii Gessel



    The controller of your personal data is Gessel, Koziorowski Kancelaria Radców Prawnych i Adwokatów Spółka Partnerska with its registered seat in Warsaw. The personal data given by you above shall be processed for purposes of replying to your query, and to contact you. You have the right to object to processing of your personal data, to request access to your data, to request corrections, and to request deletion of your data or restriction of the processing scope. For more information about how we process and protect your personal data, please refer to our Privacy Policy.